I bought a kit from e-trailer and connected to my Suzuki Samurai. Works great and I don't have to do anything to the Samurai like disconnect the battery, pull fuses, yada-yada-yada. Here's the e-trailer link to their kits. Be prepared; there are hundreds of versions! You'll need to know how many lights on the towing truck and how many on the towed for example, so the converter is the right one.
I THINK mine was plug-n-play with pigtails on the towed wiring harness that were inserted. Either that or the bulbs themselves had a pigtail.
You might just want to call e-trailer. They really made this easy for me.
https://www.etrailer.com/s.aspx?qry=towed+wiring